diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2009-06-18 01:27:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-18 22:03:52 +0200 |
| commit | 77d1ef79568b337f599b75795acc8f78a87ba9ba (patch) | |
| tree | 4fc0f622c6e064e76e6fd28981c3375ee3d153a9 | |
| parent | ptrace: don't take tasklist to get/set ->last_siginfo (diff) | |
| download | linux-77d1ef79568b337f599b75795acc8f78a87ba9ba.tar.xz linux-77d1ef79568b337f599b75795acc8f78a87ba9ba.zip | |
wait_task_zombie: do not use thread_group_cputime()
There is no reason for thread_group_cputime() in wait_task_zombie(), there
must be no other threads.
This call was previously needed to collect the per-cpu data which we do
not have any longer.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/exit.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 826e1dc8168b..94a9992e6fd9 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1191,7 +1191,6 @@ static int wait_task_zombie(struct task_struct *p, int options, if (likely(!traced)) { struct signal_struct *psig; struct signal_struct *sig; - struct task_cputime cputime; /* * The resource counters for the group leader are in its @@ -1207,23 +1206,20 @@ static int wait_task_zombie(struct task_struct *p, int options, * need to protect the access to parent->signal fields, * as other threads in the parent group can be right * here reaping other children at the same time. - * - * We use thread_group_cputime() to get times for the thread - * group, which consolidates times for all threads in the - * group including the group leader. */ - thread_group_cputime(p, &cputime); spin_lock_irq(&p->real_parent->sighand->siglock); psig = p->real_parent->signal; sig = p->signal; psig->cutime = cputime_add(psig->cutime, - cputime_add(cputime.utime, - sig->cutime)); + cputime_add(p->utime, + cputime_add(sig->utime, + sig->cutime))); psig->cstime = cputime_add(psig->cstime, - cputime_add(cputime.stime, - sig->cstime)); + cputime_add(p->stime, + cputime_add(sig->stime, + sig->cstime))); psig->cgtime = cputime_add(psig->cgtime, cputime_add(p->gtime, |